body {
  margin: 0;
  padding: 0;
}
.loading span {
  position: absolute;
  width: 50px;
  height: 50px;
  line-height: 50px;
  font-size: 22px;
  border-radius: 100px;
  background-color: #409EFF;
  text-align: center;
  opacity: 0.7;
  animation: loading 1s ease-in-out infinite;
  -webkit-animation: loading 1s ease-in-out infinite;
}
.loading span:nth-child(2) {
  left: 40px;
  border-radius: 0;
  background-color: #ff751a;
  animation: oLetter 2s ease-in-out infinite;
  -webkit-animation: oLetter 2s ease-in-out infinite;
  /*animation-delay: 0.2s;*/
  /*-webkit-animation-delay: 0.2s;*/
}
.loading span:nth-child(3) {
  left: 80px;
  animation-delay: 0.3s;
  -webkit-animation-delay: 0.3s;
}
.loading span:nth-child(4) {
  left: 120px;
  animation-delay: 0.4s;
  -webkit-animation-delay: 0.4s;
}
.loading span:nth-child(5) {
  left: 160px;
  animation-delay: 0.5s;
  -webkit-animation-delay: 0.5s;
}
.loading span:nth-child(6) {
  left: 200px;
  animation-delay: 0.6s;
  -webkit-animation-delay: 0.6s;
}
.loading span:nth-child(7) {
  left: 240px;
  animation-delay: 0.7s;
  -webkit-animation-delay: 0.7s;
}

@keyframes loading {
  0% {
    opacity: 0.6;
    transform: translateY(0);
    box-shadow: 0px 0px 3px rgba(0,0,0,0.1);
  }
  50% {
    opacity: 0.8;
    transform: translateY(-15px);
    box-shadow: 0 15px 0 rgba(0,0,0,0.2);
    background-color: #67CF22;
  }
  100% {
    opacity: 0.6;
    transform: translateY(0);
  }
}
@-webkit-keyframes loading {
  0% {
    opacity: 0.6;
    transform: translateY(0);
    box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.1);
  }
  50% {
    opacity: 0.8;
    transform: translateY(-15px);
    box-shadow: 0 15px 0 rgba(0, 0, 0, 0.2);
    background-color: #67CF22;
  }
  100% {
    opacity: 0.6;
    transform: translateY(0);
  }
}
@-moz-keyframes loading {
  0% {
    opacity: 0.6;
    transform: translateY(0);
    box-shadow: 0px 0px 3px rgba(0, 0, 0, 0.1);
  }
  50% {
    opacity: 0.8;
    transform: translateY(-15px);
    box-shadow: 0 15px 0 rgba(0, 0, 0, 0.2);
    background-color: #67CF22;
  }
  100% {
    opacity: 0.6;
    transform: translateY(0);
  }
}
@keyframes oLetter {
  0% {
    transform: rotate(0);
  }
  10% {
    transform: rotate(36deg);
  }
  20% {
    transform: rotate(72deg);
  }
  30% {
    transform: rotate(108deg);
  }
  40% {
    transform: rotate(144deg);
  }
  50% {
    transform: rotate(180deg);
  }
  60% {
    transform: rotate(216deg);
  }
  70% {
    transform: rotate(252deg);
  }
  80% {
    transform: rotate(288deg);
  }
  90% {
    transform: rotate(324deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
@-webkit-keyframes oLetter {
  0% {
    transform: rotate(0);
  }
  10% {
    transform: rotate(36deg);
  }
  20% {
    transform: rotate(72deg);
  }
  30% {
    transform: rotate(108deg);
  }
  40% {
    transform: rotate(144deg);
  }
  50% {
    transform: rotate(180deg);
  }
  60% {
    transform: rotate(216deg);
  }
  70% {
    transform: rotate(252deg);
  }
  80% {
    transform: rotate(288deg);
  }
  90% {
    transform: rotate(324deg);
  }
  100% {
    transform: rotate(360deg);
  }
}
@-moz-keyframes oLetter {
  0% {
    transform: rotate(0);
  }
  10% {
    transform: rotate(36deg);
  }
  20% {
    transform: rotate(72deg);
  }
  30% {
    transform: rotate(108deg);
  }
  40% {
    transform: rotate(144deg);
  }
  50% {
    transform: rotate(180deg);
  }
  60% {
    transform: rotate(216deg);
  }
  70% {
    transform: rotate(252deg);
  }
  80% {
    transform: rotate(288deg);
  }
  90% {
    transform: rotate(324deg);
  }
  100% {
    transform: rotate(360deg);
  }
}